Does your chair sink throughout the work day? Is it difficult to adjust your chair up and down? If so, you may need to replace the gas cylinder on your office chair to make it function properly again. Read on to learn how to replace your office chair cylinder.

Tools You'll Need

  1. A rubber mallet

  2. A pipe wrench or a screwdriver

  3. A replacement cylinder—you can request a new one by contacting NBF’s customer service.

  4. WD-40 (Only necessary for older chairs or when you're having difficulty removing parts of the chair.) 

Step 1

Tip the chair onto its side.

Step 2

Use the rubber mallet to tap the base of the chair away from the seat of the chair. Do this until you can easily remove the base from the rest of the chair.

Step 3 

The cylinder will be exposed. Use the pipe wrench to clamp tightly onto the top of the gas lift and twist. Next, pull up to remove the cylinder. 

If a pipe wrench is unavailable, you can unscrew the main bolts at the bottom of the seat to remove the mechanism from the chair. Then simply use your rubber mallet to tap the mechanism away from the cylinder, separating it from the chair. 

If it is difficult at any point to remove these parts in this step, you may need to apply WD-40 to the joints and wait for a few minutes. Be sure to cover surrounding surfaces and chair fabrics to protect them before applying WD-40.

Step 4

Now that the hydraulic cylinder has been removed, you can replace it with the new one. Insert the bottom of the cylinder into the center of the chair base.

Step 5

Carefully lift both the chair base and the chair cylinder into the chair mechanism. The parts will fasten on their own.


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